A cancerous mass is characterized on imaging, if the mass is located in the peripheral part of the lung, it may appear as a lobulated nodule, with short burrs around it, which may exert a pull on the pleura, which shows induration. If the mass is located in the central part of the lungs, it can cause obstruction to the bronchial tubes causing atelectasis and obstructive pneumonia. If the mass is located in the liver, i.e., primary hepatocellular carcinoma, it can show contrast fast in and fast out imaging on enhanced CT. If the mass is located in the kidney, it can also show contrast fast in and fast out on enhanced CT. Therefore, the judgment of cancerous mass needs to be judged by the specific location as well as the specific manifestations of imaging.